A secular tune book, undated, but watermarked 1828, and probably compiled during the second quarter of the nineteenth century. The tunes are largely unaccompanied by words, and some are marches, dance tunes and hornpipes, suggestive of instrumental use. Bass parts to some songs are included (e.g. pp. 136-140). Many of the tunes (which are indexed on pp. i-v) are of non-Welsh origin, such as Auld Lang Syne (pp. 1, 57, 78-79), The Hungarian March (p. 23), Duke of York's Cotillion (p. 24), Heart of Oak (p. 33), The Cuckoo (p. 35), Rule Britannia (pp. 36-37, 94), Downfall of Paris (p. 82) and The Huntsman Chorus (p. 90). The large number of Welsh tunes included suggest a Welsh origin, although non-traditional in background; where recorded, words are in English. Glan medd-dod mwyn is ascribed on p. 142 to 'J. Thomas [?Pentuwylo]'.
The Welsh tunes include Beaumaris Quick Step (p. 4), A Trip to Conway (p. 16), Llyweni Forest (pp. 17, 74), Nos Calan (p. 18), Morfa Rhyddlan (p. 18-19), Mentra Gwen (p. 19), Megan a Gollodd ei Gardas (pp. 20, 315), Meillionen or Sir Watkin's Delight (p. 21), Hufen y cwrw melyn (pp. 22, 26), Conceit Dafydd ap Gwilym (p. 28), Conceit William ap Owen Pencraig (Inco) (p. 29), Serch Hudol A Welsh Air (p. 31), The Men of Harlech's March (p. 65), Glan meddwdod mwyn (p. 67), The Break of Day (p. 68), Farewell Harp or Nos galan (pp. 69, 87), Gogerddan (p. 70), Penllyn Volunteers (p. 71), Ryfelgyrch gwyr Harlech (p. 72), Barmouth March (pp. 82-83), Llwyn onn (p. 84), The Rising of the Lark (pp. 97, 113), David y Gareg wen (p. 101), Merionethshire March (p. 108), Delight of the Men of Dyfi or Difyrwch gwyr Dyfi (p. 109), Black Sir Harry or Harri Ddy (p. 109), Cader Idris (p. 116), Pant corlan yr wyn (p. 123), Ffarwel Trwy'r Pwll by John Parry (p. 127), Pen Rhaw (p. 129), Noble Race was Shenkin (p. 144), Hunting the Hare (p. 145), Wrexham Hornpipe (p. 157), Dŵr Glân (p. 159), Mwynen Hafodelwy (p. 164), and Cader Idris alias Jeny Jones Llangollen (p. 166).

A book of hymn-tunes and psalm-tunes, mainly by John Williams, Dolgellau ['Ioan Rhagfyr'], together with Welsh airs: 'Difyrrwch Gwŷr y Gogledd', 'Cân hen Ŵr y Cwm' and 'Cwymp Llewelyn'.

The tune book of David Lewis, 1842, containing hymn-tunes by John Ambrose Lloyd, W. Matthews, Richard Mills ['Rhydderch Hael'], T[homas] Jarman, Evan Davies, Llanymddyfri, D[avid] Lewis and others, and a few Welsh airs.

Letters addressed to David Lewis, mainly on matters relating to Welsh music, 'eisteddfodau' and the bibliography and biography of music. The correspondents are W[illiam] T[homas] Samuel, Swansea, 1890, T. Simpson, Burnley, Charles Edwin Smith, London, 1908, 'Tafalaw' [Thomas Gruffydd Jones], 1863-1865, John Thomas, Blaenannerch and Llanwrtyd, 1864-1874, William Thomas, Treorci, 1899, B[enjamin] M[orris] Williams, Ruthin, 1864-1865, D. Williams, Llangollen, 1903, E. N. Williams, Corwen, 1866, E[llis] Ylltyr Williams, Dolgellau, 1881, G. M. Williams, Luzerne, Pennsylvania, John Cledan Williams, New Tredegar, 1900, R. Williams, Garndolbenmaen, 1869, T[homas] Williams, Llanidloes ['Hafrenydd'], 1869, W. G. Williams, Corwen, 1878-1886, and Williams Williams, Llandudno, 1862.

A miscellaneous collection of tunes by E[dward] Stephen (Tanymarian) and others, copied by D. Emlyn Evans in 1870, and an unaccompanied part song, 'O, na bae', by D. Emlyn Evans.

A collection of printed part-songs sung at Tre'rddôl, Cardiganshire, Christmas, 1868; a fragment of Y Cerbyd Cerddorol, Vol. I, parts 5, 6, published by Thomas Jones, Lixwm, and notes of a sermon by F. Gwynne, Tre'rddôl, 2 December 1866.

The music manuscripts of Alun Hoddinott, comprising mainly scores and sketches, [1940?]-2007, of orchestral, chamber and instrumental music, music for brass and wind ensembles, choral music, operas, songs, and incidental music. Early compositions and works known to have been withdrawn by the composer from his own list of works are included, together with a group of unidentified miscellaneous sketches.

The tune book of John Williams, Pentre, Llansantffraid, Cardiganshire, containing hymn-tunes by R[owland] H[uw] Pritchard, David Davies, Llanelly, Rosser Beynon ['Asaph Glan Tâf'], J[ohn] Roberts, Henllan, John Edwards, Llangadog, R[ichard] O[wen] Edwards, Ystrad Meurig, J[oseph] D[avid] Jones, Ruthin, J[ohn] Ambrose Lloyd, D[avid] Marks, Ffynnondrain, E. M. Pryce, St Harmons, John Evans, Pencarreg, Thomas Joseph, Caerfyrddin, James Mills, J[ohn] Williams, Dolgellau ['Ioan Rhagfyr'], the Reverend J. Rogers, John Francis, Ellis Williams, Corris ['Ylltyr Eryri'], D[avid] Jones, Mallwyd ['Dewi Wyllt'], Jos. Nuttall, Ysgeifiog, Owen Davies, Llanllechid ['Eos Llechid'], Dr Jones, surgeon, Devil's Bridge, E[dward] Evans, Rhymney ['Heman Gwent'], Morris Pugh, Dolgellau, Robert Williams, Liverpool, John Thomas, Tredegar, Robert Evans, Beddgelert, R. Ellis, Manchester, J[ohn] Owen ('Owain Alaw'), John Jehu, Llanfair Caereinion, W. Jones, Rhiwbryfdir, John Howel, Cwmystwyth, Rees Pryce, Merthyr, John Ellis, Caernarfon, and others; traditional Welsh melodies; two letters, 1854-1855, from John Edwards, Llangadog to David Lewis, concerning contributions to G. Harris: Haleliwia.

John Thomas ['Ieuan Ddu']: Y Caniedydd Cymreig. The Cambrian Minstrel; being a collection of the melodies of Cambria ..., Merthyr Tydfil, 1845, with additional poems and tunes and memoranda by David Lewis, including a biographical note on David Jones, printer of the Cambrian Minstrel.